I have multiple videos from which I would like to pick out sections and concatenate them into a single video. I'm extracting the secions with commands like this: ffmpeg -i 0223201332DVB-TTV2.mp4 -ss 00:00:17.160 -to 00:00:19.000 ajberovid.mp4 I have the names of all the parts in mylist.txt, and I co...